Lens attachment for lamps.



Patented .lune 26, |900.

J. C. MDLLOY.- LENS ATTACHMENT FUR LAMPS.

(Application led July 12, 1899.)

(No Model.)

Til

ahi` z .lilllill f y f N W/TNESSES:

ilton and State'of4 Ohio, have invented a new i Prion.

JOHN CHRISTOPHER MOLLOY, OF CINCINNATI, OHIO, ASIGNOR OF THREE nienrnsTo CORNEAL J. PLAcn.

MCW'ILLIAMS AND JOHN SCIIULTE, OF SAME LENS ATTAH M ENT ronV LAM Ps.

SPECIFICATION forming part of Letters :Patent No. 6152,565, dated June26, 1900.

. Application filed .l'uly 12, 1899. Serial No, 723,580. (llo model.)

To all whom, t may concern: Y

Be it known that I, JOHN CHRISTOPHER MOLLOY, of Cincinnati, in thecounty of Hamand Improved Lens Attachment for Lamps, of which thefollowing is a full, clear, and exact description. i

The object of the invention is to provide a new and improved lensattachment for lamps designed to increasethe illuminating power of alamp.

The invention consists of novel features and parts and combinations ofthe same, as will be fully described hereinafter and then pointed ont inthe claims.

A practical embodiment of my invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar' characters of reference indicate corresponding parts in boththe views.

Figure l is a sectional side elevation of the improvement, and Fig. 2 isa sectional plan view of the same on the line 2 2 in Fig. l.

As shown in the drawings, the cylindrical lamp-chimney is provided witha base A, the cylindrical burner portion A being somewhat less indiameter than the base and terminating in a still more reduced topportion A2. On the junction between the base A and the cylindrical iameor burner portion'A' is arranged an annular external saddle or seat A3,on which is adapted torest the lower end of a lens B, made tubular andsurrounding the burner or flame portion A', an air-space be' ing betweenthe inner surface of the lens and the portion A. The lens B, as shown,is plano-convex; but I do not limit myself to the exact form shown.

On the lower end of the lens B is formed an inwardly-extending flange Bfor increasing the seating-surface of the lens on the saddle A3 and forreceiving the outer ends of bends or projections C in a ring C,preferably of split form and seated in an annular groove in the chimney,as is plainly shown in Fig. 1, said ring serving to hold the lens Bconcentric to the chimney and leave a uniform airspace between the lensand the chimney.

In order to allow air to circulate through the air-space tokeep the lensand chimney as `cool as possible, I prefer to form the saddle AB withrecesses A4 to allow the air to pass to the lower end of the air-spaceand ascend therein and pass out of the sameat the upper end of thelens.`

By the arrangement described the lens is securely held in place on thechimney when the lat-ter is placed in position on the lamp, and whenvthe burner is lighted then the rays of light from the flame pass throughthe chimney portion A and are retracted by the lens B into the room, sothat the latter is very highly illuminated.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patentl. A lens attachment for lamps, consisting of atubular lens adapted to surrpund a lampchimney opposite the liame orburner portion, a retaining and spacing device carried by thelamp-chi1nney-for holding said lens in position concentric to thechimney to leave a uniform airspace between the lens and the chimney,and air-inlets leading to the lower end of the said air-space,substantially as described.

2. A lens attachment for lamps consisting of a tubularlens adapted tosurround a lampchimney, and having an inwardly-extending flange at itslower end, and aspacing device engaging the said flange, to hold thelens concentricfto the chimney, substantially as described.

3. The combination with a chimney provided with an external scat, of'atubular lens having an inwardlyextendingange at its lower end adapted torest on the seat on the lamp-chimney, and a retaining and spacing devicefor holding the lens in position on the chimney and properly spacedtherefrom, substantially as set forth.

4. The combination with a chimney, of a lens supportedat its lower endthereon and surrounding the chimney at the flame or burner portion, anda ring carried' by the chimney and engaging the lens to hold it properlyspaced from the chimney, as set forth.

5. The combination with a chimney pro* vided Awith an external saddle orscat, of a IOO tubular lens having a ange at its lower end adapted torest on the said seat, and a device vided with an external saddle orseat, of a` tubular lens set on the seat and spaced from the chimney,and a device for holding said lens to the seat and properly spaced fromthe chimney, as set forth.

7. The combination, with a chimney provided with an external saddlehaving recesses for the admission of air, of a tubular lens having aninwardly-extending flange at its lower end and set on said base, and aring having projecting portions and held on the chimney and engaging thesaid lens at said flange,l

substantially as shown and described.

or burner portion of the chimney and rest on the said seat, the saidlens being spaced from 3 the chimney, and the said seat being providedwith recesses to allow air to pass to the space between the lens andchimney, substantially as described.

9. The combination with a lamp-chimney provided with an externalrecessed seat, of a tubular lens spaced from the chimney and adapted torest. on said seat, as set forth.

l0. The combination with a lamp-chimney provided with a base of greaterdiameter than the ame or burner portion of the chimney, the said chimneyhaving an external seat located at or near the junction of the base andthe fiame or burner portion, of atubular lens adapted to surround theiiame or burner portion of the said chimney and rest with its lower endon the said seat, and means for holding the said lens in position on theseat and spaced from the chimney, the said seat being constructed toadmit air to the lower end of the space between the lens and thechimney, substantially as described.

1l. The combination with a lamp-chimney provided with an external seatand having an annular groove adjacent to the seat, of a tubu- 8. Thecombination With a lamp-chimney having an annular seat near vits lowerend, of:

va tubular lens adapted to surround the flame lar lens adapted to beseated on said seat, and a split ring of spring materia-l adapted to beseated in said annular groove in the chimney the said ring having bendsor project-ions ar-4 ranged to 'engage the said lens, substantially asdescribed.

JOHN CHRISTOPHER lllOLL'OY.

lVitnessesz,

MILLARD F. RoEBLINe, THos. W. LINEHAN.

